<template>
  <div class="tree-cw">
    <el-input
          placeholder="输入关键字进行过滤"
          v-model="filterText">
    </el-input>
    <el-tree
      class="filter-tree"
      :data="data2"
      :props="defaultProps"
      default-expand-all
      accordion
      :filter-node-method="filterNode"
      ref="tree2">
    </el-tree>
  </div>
</template>

<script>
  export default {
    watch: {
      filterText(val) {
        this.$refs.tree2.filter(val);
      }
    },

    methods: {
      filterNode(value, data) {
        if (!value) return true;
        return data.label.indexOf(value) !== -1;
      }
    },

    data() {
      return {
        filterText: '',
        data2: [{
          id: 1,
          label: '一级 1',
          children: [{
            id: 4,
            label: '二级 1-1',
            children: [{
              id: 9,
              label: '小猪佩奇'
            }, {
              id: 10,
              label: '花木兰'
            }]
          }]
        }, {
          id: 2,
          label: '温伟杰',
          children: [{
            id: 5,
            label: '二级 2-1'
          }, {
            id: 6,
            label: '二级 2-2'
          }]
        }, {
          id: 3,
          label: '一级 3',
          children: [{
            id: 7,
            label: '木须'
          }, {
            id: 8,
            label: '二级 3-2'
          }]
        }],
        defaultProps: {
          children: 'children',
          label: 'label'
        }
      };
    }
  };
</script>

